Question

How to use variadic function in C

Answer 1

#include <stdio.h>          
#include <stdarg.h>

// int function_name(data_type variable_name, ...);

void f(int total, ...) {
	va_list ptr;
	va_start(ptr, total);

	for (int i = 0; i < total; i++) {
		double next_number = va_arg(ptr, double);
		printf("%f ", next_number);
	}
	printf("\n");

	va_end(ptr);
}


int main(void)
{
	f(3, 3.14f, 4.18f, 6.17f);
	
	f(2, 87.91f, 1987.576f);

	return 0;
}




/*
run:
 
3.140000 4.180000 6.170000
87.910004 1987.576050
 
*/

 

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